Positive crankcase ventilation system



Jan. 24, 1967 R. P. BRUENN 3,299,873

POSITIVE CRANKGASE VENTILATION SYSTEM Filed May 13, 1966 IN VEN TOR.

Rabarf R Brae/m United States Patent 3,299,873 POSITIVE CRANKCASE VENTILATION SYSTEM Robert P. Bruenn, 3226 NE. Glisan St.,

\ Portland, Oreg. 97232 Filed May 13, 1966, Ser. No. 549,872

r Claims. (Cl. 123119) This invention relates to crankcase breathers of internal combustion engines, and more particularly to an improved crankcase ventilation system.

It is therefore the main purpose of this invention to provide a crankcase ventilation system for an internal combustion engine which will remove the toxic and abrasive substances from the vapor created in the crankcase of the engine and will collect the substances in a jar member which will have means for purifying the vapor so that it may be directed into the intake manifold of the engine.

Another object of this invention is to provide a crankcase ventilation system which will free the crankcase of impurities so that inpairment of the internal combustion engine will be greatly reduced by the use of this system.

Another object of this invention is to provide a crankcase ventilation system which will be of such construction so as to enable burning of any escaped gases which may blow by the piston rings of the engine.

Still another object of this invention is to provide a crankcase ventilation system which will have a transparent container for collecting deposits and which may be readily removed from the system allowing for cleaning thereof.

A still further object of this invention is to provide a crankcase ventilation system which will be inexpensive to manufacture and will provide maximum utility to its user.

Other objects and advantages of this invention will become apparent from a consideration of the following detailed description taken in connection with the accompanying drawing, wherein a satisfactory embodiment of the invention is shown. However, it is to be understood that the invention is not limited to the details disclosed but includes all such variations and modifications as fall within the spirit of the invention and the scope of the appended claims.

In the drawing:

FIGURE 1 is a side view of this invention shown partly broken away with the container shown in phantom lines;

FIGURE 2 is an enlarged cross-sectional view taken along the lines 2-2 of FIGURE 1 and viewed in a direc tion indicated by the arrows;

FIGURE 3 is an elevated view of an internal combustion engine showing the invention attached thereto.

According to this invention, a crankcase ventilation system is provided with a transparent container 11 having an open upper extremity and is capable of being removably secured to a circular lid 12. A hollow cylindrical can 13 is integrally secured to the cover portion of lid 12 which here and after will be described. Lid 12 is provided with a plurality of spaced apart openings 14 allowing for the passage of gasses. A flexible hose 15 is se cured to the breather tube 16 extending from the crankcase of internal combustion engine 17. The other side of hose 15 is removably secured to a metallic tube 18 which protrudes through the cover portion of lid 12 and assumes a l-sh aped configuration for properly directing the gasses. The other end of tube 18 is positioned in close proximity to the bottom portion of cylindrical can 13 for a purpose which here and after will be described. For the sake of rigidity, a bracket 19 is provided for connecting tube 18 with can 13. Another flexible tube 20 extends from the intake manifold 21 to carburator 22 and is secured to a metallic tube 23 which extends through the cover portion of lid 12 and is in parallel relationship 2 with tube 18. The hollow end of tube 23 is positioned in close proximity with the bottom portion of can 13 and forms an air gap 24. Bracket 25 is provided for securing the bottom portion of tube 23 to the inside portion of can 13.

In operation, hose 15 is directly connected with the conventional breather tube 16 extending from the crankcase of engine 17. It should be noted that as the gasses and air pass by the gap 24 inside the can 13, they draw heat air away from the bottom of the can so that any moisture which was originally present in the gasses, will cool, condense and precipitate to the bottom of the transparent container 11. Fumes disposed from crankcase 17 enter the transparent container 11 through the metallic tube 18 and are propelled across the bottom portion of can 13. The moisture in the gasses cools as soon as they reach the bottom portion of the can 13, and then drops to the bottom of the container 11 carrying with it toxic and abrasive material. The lighter substances, such as gas vapors travel upwards and enter cylindrical can 13 through the plurality of openings 14. Gasses are dis-posed into the intake manifolds by means of flexible tube 20.

Looking now to FIGURE 2 of the drawing, one will see that air gaps 24 and 24 are of paramount importance due to these gaps exercising controlling influences upon the vapor movements within the ventilation system. Also, the bottom portion of cylindrical can 13 is made of a noncorrosive metallic material which will resist high temperatures to which the can 13 may be exposed during the operation of this ventilation system. It shall further be noted that transparent container 11 is made of transparent or translucent material such as plastic or glass may be readily removed from lid 12 in order for it to be easy to clean.

It will be noted also that the free end of the breather tube 16 must be closed by any suitable means, such as a plug, etc.

What I now claim is:

1. A crankcase ventilation system for internal combustion engines comprising, a container having an opening therein, a lid remov ably secured to said container, a hollow cylindrical can having a plurality of spaced apart openings to the upper portion thereof, said can being secured to the cover portion of said lid and being positioned within said container, a first metallic and J-shaped configurated tube passing through said cover portion of said lid, a first flexible tube extending from the crankcase of said engine, the other end of said metallic tube positioned in close proximity to the bottom portion of said can so that when the hot fumes are transgressed through the flexible and metallic tubes to said can the heavier substances of the fumes settle down to the bottom portion of said container and the lighter, gaseous fumes enter said can through said plurality of openings therethrough, the second metallic tube of elongated configuration passing through said cover of said lid and being positioned within said can, the end extremity of said second tube being in close proximity with the bottom portion of said can, securing means for securing both metallic tubes to said can, sec-0nd flexible tube secured through the other end of said second metallic tube for transgressing gaseous fumes from said can and said second metallic tube to the intake manifold of said carburator of said engine.

2. A ventilation system for internal combustion engines according to claim 1, wherein said container is made of transparent material and is adapted to be removed from said lid for disposing waste material from said container.

3. A ventilation system according to claim 1 wherein said lid is provided with a pair of openings for admitting said first and second metallic tubes and bracket means provides rigidity for said tubes.

4. A ventilation system according to claim 1 wherein 3 said first flexible tube for transmitting fumes into first metallic tube is in direct communication With the breather tube of said crank-case of said engine.

5. A ventilation system according to claim 1, wherein one of the pair of said brackets firmly secures the outward end of first metallic tube to the bottom portion of said cylindrical can and thereby provides an air gap for the fume escaping said first metallic tube, the other of said bracket securing the inward portion of said second metallic tube with the inside portion of said bottom portion of said can and there provides an air gap for admitting gaseous fumes from said can into said second metallic tube.

References Cited by the Examiner UNITED STATES PATENTS 8/1922 Tracy 123-199 l/ 1948 Krieck. 9/1953 Nusbaum 1'23-119 1/1956 R-o-bley 123 119 4/1956 Krieck 123-119 X 32/1966 Van Dollah 1'23 119 FOREIGN PATENTS 8/1923 France,

MARK NEWMAN, Primary Examiner.

A. L. SMITH, Assistant Examiner. 

1. A CRANKCASE VENTILATION SYSTEM FOR INTERNAL COMBUSTION ENGINES COMPRISING, A CONTAINER HAVING AN OPENING THEREIN, A LID REMOVABLY SECURED TO SAID CONTAINER, A HOLLOW CYLINDRICAL CAN HAVING A PLURALITY OF SPACED APART OPENINGS TO THE UPPER PORTION THEREOF, SAID CAN BEING SECURED TO THE COVER PORTION OF SAID LID AND BEING POSITIONED WITHIN SAID CONTAINER, A FIRST METALLIC AND J-SHAPED CONFIGURATED TUBE PASSING THROUGH SAID COVER PORTION OF SAID LID, A FIRST FLEXIBLE TUBE EXTENDING FROM THE CRANKCASE OF SAID ENGINE, THE OTHER END OF SAID METALLIC TUBE POSITIONED IN CLOSE PROXIMITY TO THE BOTTOM PORTION OF SAID CAN SO THAT WHEN THE HOT FUMES ARE TRANSGRESSED THROUGH THE FLEXIBLE AND METALLIC TUBES TO SAID CAN THE HEAVIER SUBSTANCES OF THE FUMES SETTLE DOWN TO THE BOTTOM 